Percussive tool



Dec. 30, 1924. 1,521,036

- H. H. MERCER PERCUS SIVE 'IGOL Original Filed May 19, 1920 PatentedDec. 30, 1924.

UNITED STATES PATENT OFFICE.

HENRY H. MERCER, F CLAREMONT, NEW HAMPSHIRE, ASSIGNOR TO SULLIVAN MA-CHINERY COMPANY, A CORPORATION OF MASSACHUSETTS.

PERCUSSIVE TOOL.

Application filed May 19, 1920, Serial No. 382,620. Renewed August 28,1922.

To all whom it may concern,

Be it known that I, HENRY I-I. MERGER, a citizen of the United States,residing at Claremont, in the county of Sullivan and State of NewHampshire, have invented certain new and useful Improvements inPercussive Tools, of which the following is a full, clear, and exactspecification.

My invention relates to percussive tools, and particularly to that classof channelers in which a plurality of gangs are mounted on a singletruck.

It has for its object to provide an improved percussive tool of themultiple tool type. Another object of my invention is to provide animproved channeling mechanism of the multiple gang type in which anelectrically driven pressor cylinder is'used to generate fluctuations ofoperating fluid to cause reciprocation of the gangs. A further object ofmy invention is to provide a mech anism of the class described in whicha single actuating or pressor cylinder may cause simultaneous operationof the plurality of gangs, but cause their operation in a steppedrelation. A still further object of my invention is to provide achanneler of the pneumatic type in which a plurality of gangs are causedto reciprocate in opposite direc tions by means of a single pressorcylinder.

In the accompanying drawings I have shown for purposes of illustration,my invention applied to a track channeling machine in which a pluralityof gangs are transported on a truck upon which the pressor cylinder isalso mounted.

In these drawings,-

The figure is a view partially in elevation and partially taken incentral vertical section through the cylinders of the tool motors andpressor.

In this illustrative embodiment I have shown the parts mounted on atruck gen erally designated by 1 which is provided with. the usualwheels 2 adapted to guide the truck and cause its motion along a track3. Mounted atopposite ends of the truck are a pair of standards 4, 4'upon which are mounted tool motor cylinders 5, 5, these cylinderscontaining pistons 6, 6, having piston rods 7, 7 connected'to andactuating gangs of channeling tools 8, 8.

These tool motor cylinders and related parts are identical inconstruction. In each, the upper end of the piston rod is providedSerial No. 584,763.

some cases, while operation continues, the

upward movement of the tools is sluggish. I have accordingly providedlarger cylinders 5, 5 and by the use of the differential piston rods,secured a greater upwardly acting force than in the ordinary machinewithout making the downward force sutficient to ofi'set the improvement.

Mounted between the two tool cylinders is a pressor cylinder 10 in whicha ditl'erential piston 11 reciprocates under the action of a drivingmotor 12 which transmits its rotary motion by way of gearing 13, andfrom the latter to a crank, not shown, and so to a connecting rod 14which causes reciprocation of the piston 11. To the op posite ends ofthe pressor cylinder 10 are secured Y connections 15 and 16 which have,respectively, branches 17 and 18, and 19 and 20. These branches lead tothe cylinders 5, 5 of the tools and the Y connection 15 leads by meansof its branches 17 and 18 respectively to a point adjacent the bottom ofthe right hand cylinder 5' and to the top of the left hand cylinder 5,whereas Y connection 16 leads by means of branch 19 to a point adjacentthe bottom. of the left hand cylinder 5 and by means of connection 20 toa point adjacent the top ofth'e right hand cylinder 5'.

From this construction it will be obvious that downward movement of thepressor piston 11 will cause a compression below the piston and araretaction above the piston and that the left hand piston 6 will bemoved upward while the right hand piston 6 will simultaneouslybe moveddownward and that reverse movement of the piston 11 will effect anopposite result. In other words, the two gangs of tools will be movingsimultaneously, but will be separated in operation by a phase differenceof 180 degrees.

One advantage of this construction is that vibration is reduced in avery desirable manher. A second advantage is that by the proportioningof the parts a very rapid and reliable channeler is provided in whichpositiveness and speed are combined to a high degree.

While I have in this application specifically described one form whichmy invention may assume in practice, it will be understood that thisform of the same is shown for purposes of illustration and that the invention may be modified and embodied in other forms without departingfrom its spirit or the scope of the appended claims.

lVhat I claim as new and desire to secure by Letters Patentis:

1. In a percussive tool, a double acting fluid pressor, a plurality oftools having actuating cylinders, conduits connecting one end of saidpressor with opposite ends of said cylinders, and conduits connectingthe other end of said pressor with the remaining ends of said cylinders.

2. In a percussive tool, a double acting fluid pressor, a. plurality oftools having actuating cylinders, branched connections leading from theopposite ends of said pressor, the branches of one of said connectionsbeing joined to the opposite ends of adjacent cylinders and the branchesof the other connection being cross connected to the remaining ends ofthe cylinders where by opposite impulses are transmitted to the toolactuating cylinders.

3. In combination, two gangs of channeler tools, separate actuatingmotors for each gang, a double acting pressor cylinder, a connectionfrom one end of said pressor cylinder to one end of one of said firstmentioned motors and to the opposite end of the other thereof, and aconnection from the opposite end of the pressor cylinder having branchesleading to the remaining ends of said motors.

4. In combination, a fluid pressor, two' gangs of channeling tools,actuating motors ton rod and being subjected alternately on oppositesides to fluid pressure from said pressor.

6. In a percussive 11160l1LI1lS111,2L double acting fluid pressorcomprising a cylinder having a double acting piston therein, a

' plurality of tools, actuating means for each of said tools includingrelatively movable cylinder and piston members one of which is connectedto each of said tools, and conduits connecting the ends of the pressorto the spaces at opposite sides of the pistons of said tool actuatingmeans whereby the simultaneous movements of the tools are in oppositedirections.

7. In a percussive mechanism, a double acting fluid pressor, a pluralityof tools, actuating means for said tools respectively each comprisingrelatively reciprocable cylinder and piston elements one of which isoperatively connected to its respective tool, conduits connecting oneendof said pressor with the spaces atone side of one of said pistons and atthe other side of the other of said pistons, and conduits connecting theother end of said pressor with the remaiuing ends of said cylinders.

8. In a percussive mechanism, a pair of tools, operating means for eachof said tools each comprising relatively reciprocable cylinder andpiston elements one of which is operatively connected to its respectivetool, and pressor means for causing operation of said tools in alternatestriking relation by subjecting each of said tools simultaneously topressure generated by said pressor means.

9. In a percussive mechanism, a plurality of tools, operating means foreach of said tools comprising relatively reciprocable cyl inder andpiston elements one of which is operatively connected to its respectivetool, and movable fluid pressure generating means operative in timedrelation with respect to said tools and operatively connected thereto tosequentially operate the same by simultaneously subjecting the same topressure fluid from said generating means.

10. In a percussive mechanism, a plurality of tools, fluid pressureactuated means therefoig'movable fluid pressure generating means themovement of which has timed relation with respect to the operation ofsaid tools, and independently operative connections between said meansand each of said tools to simultaneously transmit pressure fluid theretoto cause sequential opera tion of the same.

11. In a percussive mechanism, a plurality of tools, movable actuatingmeans therefor the movement of which has timed relation to the operationof said tools, and means including yieldable means whereby said toolsand actuating means are operatively connected for sequential operationof said tools to simultaneously impart substantially equal actuatingforces. thereto.

12. In combination with a fluid pressor, a channeler comprising a toolgang, and means subjected to pressure fluctuations produced by saidpressor for reciprocating lot) said gang including a piston member, acylinder member in which said piston member moves, one of said membersbeing operatively connected to said gang and the other held relativelystationary, means connecting the spaces in said cylinder member atopposite sides of said piston member with said pressor, and means forcausing the gang lifting impulse imparted by said pressor to exceed thestriking impulse imparted thereby.

13. In combination with a fluid pressor, a channeler comprising a toolgang, and means subjected to pressure fluctuations produced by saidpressor for reciprocating said gang including a piston member, acylinder member in which said piston mem ber moves, one of said membersbeing operatively connected to said gang and the other held relativelystationary, means connecting the spaces in said cylinder member atopposite sides of said piston member with said pressor, and meansincluding rods of different size at opposite sides of said piston forcausing the gang lifting impulse imparted by said pressor to exceed thestriking impulse imparted thereby.

14. In a percussive mechanism, a plurality of tools having actuatingcylinders, pressor means for creating a series of timed impulses,conduit means leading to the opposite ends of said cylinders, conduitmeans leading to the other ends of said cylinders, and connectionsbetween said conduit means and said pressor means whereby successiveimpulses are transmitted to said conduit means in turn.

15. In a percussive mechanism, a plurality of tools each havingactuating means comprising relatively reciprocable cylinder and pistonelements one of which is operatively connected to its respective tool,pressor means comprising elements cooperating to form a pair of chambersof alternately enlarging and diminishing volume, conduit meansconnecting one of said chambers to the spaces at opposite sides of saidpiston elements, and conduits connecting the other of said chambers tothe spaces at the other sides of said piston elements.

16. In a percussive mechanism, a plurality of tools, pressure actuatingmeans therefor, fluid pressure generating means, and means whereby saidtools are subjected simultaneously to pressure fluid generated by saidgenerating means to cause sequential operation of said tools.

17. In a percussive mechanism, a plurality of tools, fluid pressureactuated means therefor, fluid pressure generating means adapted tosequentially actuate said tools by simultaneously subjecting each of thesame to pressure from said generating means, and means whereby theactuating pressure fluid for simultaneously actuating said tools isequalized.

18. In a percussive mechanism, a plurality of tools, reciprocating fluidpressure actuated means therefor, fluid pressure generating meansadapted to sequentially actuate said tools by simultaneously subjectingeach of the same to pressure from said generating means, and meanswhereby the actuating pressure fluid for simultaneously actuating saidtools is equalized during one stroke of the operation of each of saidtools.

In testimony whereof I aifix my signature.

HENRY H. MERCER.

